import axios from 'axios'
import { MessageBox, Message, Loading } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from "@/utils/ruoyi";
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { cnt: 0 };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 100000
})

// request拦截器
service.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
    config.headers['appToken'] = getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  /*if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                  // 请求地址
      const s_data = sessionObj.data;                // 请求数据
      const s_time = sessionObj.time;                // 请求时间
      const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }*/
  return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(response => {
    if (isRelogin.cnt === 0) {
      isRelogin.cnt = 1
    } else if (isRelogin.cnt === 1) {
      isRelogin.cnt = 2
    }
    const res = response.data
    const code = response.data.code || 200
    // 二进制数据则直接返回
    if (response.request.responseType === 'blob' || response.request.responseType === 'arraybuffer') {
      console.log(response)
      return response
    }

    if (code !== 200) {
      if (res.timeout === true || res.msg.indexOf('token') !== -1) {
        if (isRelogin.cnt === 2) {
          console.log(response);
          MessageBox.confirm('会话过期，是否跳转到登录页面？', '会话过期', {
            confirmButtonText: '重新登录',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {
            store.dispatch('FedLogOut').then(() => {
              location.reload()
            })
            /*store.dispatch('user/resetToken').then(() => {
              location.reload()
            })*/
          }).catch(() => {

          })
          return Promise.reject(new Error(res.msg))
        }
        return res
      } else if (code === 401 || code === 400 || code === 403 || code === 500) {
        Message({
          message: res.msg,
          type: 'error',
          duration: 5 * 1000
        })
      } else if (code === 404) {
        Message({
          message: res.msg || '访问的资源不存在',
          type: 'warning',
          duration: 5 * 1000
        })
      } else {
        Message({
          message: res.msg || '请求失败',
          type: 'warning',
          duration: 5 * 1000
        })
      }
      return Promise.reject(new Error(res.msg || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    let { message } = error
    if (message === 'Network Error') {
      message = '网络异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    Message({
      message: message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({ text: "正在下载，请稍候", spinner: "font-14 el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })
  return service.post(url, params, {
    transformRequest: [(params) => { return tansParams(params) }],
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    responseType: 'blob',
    ...config
  }).then(async (response) => {
    let data = response.data
    const isBlob = await blobValidate(data) || response.headers['filename'];
    if (isBlob) {
      filename = filename || response.headers['filename'] || '未知文件名'
      filename = decodeURI(filename)
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

export default service
